April weather forecastSpearfish, SD
April
Weather in April
April brings with it noticeably warmer temperatures, and typical weather averages move beyond the brisk 50s°F. On this upward climb, snowfall dips dramatically allowing rainfall to dominate the landscape of Spearfish. This shift embodies the arrival of spring with precipitation largely occurring as rain, peaking at 2.01" (51mm). The city enjoys longer daylight hours and increased sunshine, both promising indicators of the approaching summer. The wind, though at its peak, enhances the spring-like feel of the weather.Temperature
With the start of April in Spearfish, the average high-temperature marginally shifts from March's frosty 44.1°F (6.7°C) to a fresh 51.4°F (10.8°C). Nighttime temperatures consistently average a wintry 33.4°F (0.8°C) during April.Humidity
In Spearfish, the average relative humidity in April is 69%.Rainfall
In April, in Spearfish, the rain falls for 12.1 days. Throughout April, 2.01" (51mm) of precipitation is accumulated. In Spearfish, South Dakota, during the entire year, the rain falls for 99.6 days and collects up to 15.63" (397mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. April is the month with the most snowfall. Snow falls for 6 days and accumulates 7.36" (187mm) of snow.Daylight
In April, the average length of the day is 13h and 31min.On the first day of April in Spearfish, sunrise is at 6:34 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 7:59 pm MDT.
Sunshine
In April, the average sunshine in Spearfish is 9.1h.UV index
The months with the lowest UV index are January, February, April, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 2 in April interprets into the following advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Spearfish, SD
- Average high temperature in April: 51.4°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (30.9°F).
- Average low temperature in April: 33.4°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure in April
Spearfish, SD
- Average pressure in April: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in April
Spearfish, SD
- Average wind speed in April: 9.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity in April
Spearfish, SD
- Average humidity in April: 69%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (49%).
Average rainfall in April
Spearfish, SD
- Average rainfall in April: 2.01"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in April
Spearfish, SD
- Average rainfall days in April: 12.1 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in April
Spearfish, SD
- Average snowfall in April: 7.36"
The month with the highest snowfall is April (7.36").
The months with the least snowfall are June, July and August (0").
Average snowfall days in April
Spearfish, SD
- Average snowfall days in April: 6 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Spearfish, SD
- Average daylight in April: 13h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in April: 9h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in April
Spearfish, SD
- Average sunshine days in April: 12.8 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (12.7 days).
Average UV index in April
Spearfish, SD
- Average UV index in April: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, April, November and December (UV index 2).
Average cloud cover in April
Spearfish, SD
- Average cloud cover in April: 40
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in April
Spearfish, SD
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
